Hmm, well I guess I'll have to delve deeper. Results:-

Group 034: O2S Aging Bank 1
760 /min Engine RPM 650 to 720rpm
365.0°C Exhaust Temp >200 Celsius
0.64 s Time Period 0.1-1.8s
B1-S1 OK Diag Status Test/ON/OFF|OK

Group 035: O2S Aging Bank 2
760 /min Engine RPM 650 to 720rpm
365.0°C Exhaust Temp >200 Celsius
0.56 s Time Period 0.1-1.8s
B2-S1 OK Diag Status Test/ON/OFF|OK

Group 036: O2S Beyond TWC [B=Bank S=Sensor]
0.845 V Volt Supply B1S2 0-1V
B1-S2 OK Diag Status B1S2 Test/ON/OFF|OK
0.840 V Volt Supply B2S2 0-1V
B2-S2 OK Diag Status B2S2 Test/ON/OFF|OK

Group 037: Oxygen Sensor Control System Bank 1
15.8 % Engine Load 13.5-22.5%
0.080 V O2S Volt B1 S2 0.1-1.0V
0.0 ms Corr val B1 S1-S2 -200-200ms
System OK Diag Status Test/ON/OFF|OK

Group 038: Oxygen Sensor Control System Bank 2
15.8 % Engine Load 13.5-22.5%
0.095 V O2S Volt B1 S2 0.1-1.0V
0.0 ms Corr val B1 S1-S2 -200-200ms
System OK Diag Status Test/ON/OFF|OK

Group 041: Oxygen Sensor Heater Bank 1 @Idle
0.10 kOhm Sensor 1 Resist 0-0.9 KOhm
Htg. S1 ON Heater Bf TWC Status
0.20 kOhm Sensor 2 Resist 0-0.9 KOhm
Htg. S2 ON Heater Af TWC Status

Group 042: Oxygen Sensor Heater Bank 2 @Idle
0.10 kOhm Sensor 1 Resist 0-0.9 KOhm
Htg. S1 ON Heater Bf TWC Status
0.10 kOhm Sensor 2 Resist 0-0.9 KOhm
Htg. S2 ON Heater Af TWC Status

Needless to say, Group 046 test failed again, same inefficient story.

Do these values look ok for the O2 sensors? I presume they must be as the tests concluded as ok with VCDS.